Crossword Genius

Strange vice and unknown perversion (8)

Ross

I believe the answer is:

deviancy

'perversion' is the definition.
(thesaurus)

'strange vice and unknown' is the wordplay.
'strange' is an anagram indicator.
'unknown' becomes 'y' (algebra).
'vice'+'and'='viceand'
'viceand' with letters rearranged gives 'devianc'.
'devianc'+'y'='DEVIANCY'

(Another definition for deviancy that I've seen is " Aberration".)

I've seen this clue in The Times.
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